Summary:
Timed practice for addition, subtraction, multiplication and division.
Top-10 online high score rank for 5 level.
<Level 1>
Addition facts - sums to 30.
20 problems
e.g.
a + b = ?
<Level 2>
Addition, and subtraction.
sums to a two-digit number.
20 problems
e.g.
a + b = ?
a + ? = c
<Level 3>
Addition, subtraction, Multiplication, and Division.
sums to a two-digit number.
20 problems
e.g.
a x b = ?
a x ? = c
<Level 4>
Addition, subtraction, Multiplication, and Division.
sums to a two-digit number.
20 problems
e.g.
a x b = ?
a x ? = c
a ? b = c
<Level 5>
200 problems
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